2. Philosophy

So the aim was, on the one hand, to gain empirical knowledge about the world, insofar as it is accessible to experience, and, on the other hand, to gain rational knowledge that extends over everything, which, so to speak, is to be gained from reason alone. And so, alongside, say, revealed theology, a rational, a rational theology was established, alongside empirical psychology a rational psychology, alongside the knowledge of the world gained through experience, a rational geology, and so on. The underlying reason for this search for a particular science of reason was that people said: there is no certainty for scientific research in an external world. But if one wants to have such certainty, it can only be gained by deriving it from reason itself.